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/*
* (C) Copyright 2000
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <status_led.h>
/*
* The purpose of this code is to signal the operational status of a
* target which usually boots over the network; while running in
* PCBoot, a status LED is blinking. As soon as a valid BOOTP reply
* message has been received, the LED is turned off. The Linux
* kernel, once it is running, will start blinking the LED again,
* with another frequency.
*/
/* ------------------------------------------------------------------------- */
#ifdef CONFIG_STATUS_LED
typedef struct {
ulong mask;
int state;
int period;
int cnt;
} led_dev_t;
led_dev_t led_dev[] = {
{ STATUS_LED_BIT,
STATUS_LED_STATE,
STATUS_LED_PERIOD,
0,
},
#if defined(STATUS_LED_BIT1)
{ STATUS_LED_BIT1,
STATUS_LED_STATE1,
STATUS_LED_PERIOD1,
0,
},
#endif
#if defined(STATUS_LED_BIT2)
{ STATUS_LED_BIT2,
STATUS_LED_STATE2,
STATUS_LED_PERIOD2,
0,
},
#endif
};
#define MAX_LED_DEV (sizeof(led_dev)/sizeof(led_dev_t))
static int status_led_init_done = 0;
static void status_led_init (void)
{
volatile immap_t *immr = (immap_t *)CFG_IMMR;
int i;
for (i=0; i<MAX_LED_DEV; ++i) {
led_dev_t *ld = &led_dev[i];
immr->STATUS_LED_PAR &= ~(ld->mask);
#ifdef STATUS_LED_ODR
immr->STATUS_LED_ODR &= ~(ld->mask);
#endif
#if (STATUS_LED_ACTIVE == 0)
if (ld->state == STATUS_LED_ON)
immr->STATUS_LED_DAT &= ~(ld->mask);
else
immr->STATUS_LED_DAT |= ld->mask ;
#else
if (ld->state == STATUS_LED_ON)
immr->STATUS_LED_DAT |= ld->mask ;
else
immr->STATUS_LED_DAT &= ~(ld->mask);
#endif
immr->STATUS_LED_DIR |= ld->mask ;
}
status_led_init_done = 1;
}
void status_led_tick (ulong timestamp)
{
volatile immap_t *immr = (immap_t *)CFG_IMMR;
int i;
if (!status_led_init_done)
status_led_init();
for (i=0; i<MAX_LED_DEV; ++i) {
led_dev_t *ld = &led_dev[i];
if (ld->state != STATUS_LED_BLINKING)
continue;
if (++(ld->cnt) >= ld->period) {
immr->STATUS_LED_DAT ^= ld->mask;
ld->cnt -= ld->period;
}
}
}
void status_led_set (int led, int state)
{
volatile immap_t *immr = (immap_t *)CFG_IMMR;
led_dev_t *ld;
if (led < 0 || led >= MAX_LED_DEV)
return;
if (!status_led_init_done)
status_led_init();
ld = &led_dev[led];
switch (state) {
default:
return;
case STATUS_LED_BLINKING:
ld->cnt = 0; /* always start with full period */
/* fall through */ /* always start with LED _ON_ */
case STATUS_LED_ON:
#if (STATUS_LED_ACTIVE == 0)
immr->STATUS_LED_DAT &= ~(ld->mask);
#else
immr->STATUS_LED_DAT |= ld->mask ;
#endif
break;
case STATUS_LED_OFF:
#if (STATUS_LED_ACTIVE == 0)
immr->STATUS_LED_DAT |= ld->mask ;
#else
immr->STATUS_LED_DAT &= ~(ld->mask);
#endif
break;
}
ld->state = state;
}
#endif /* CONFIG_STATUS_LED */
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